Inspiratory muscle exerciser or similar article



FIG. 1 is a perspective view of an inspiratory muscle exerciser or similar article showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a right end elevational view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for an inspiratory muscle exerciser or similar article, as shown. 